import { JweHeader } from './jwe/IJweGeneralJson';
import { JwsHeader } from './jws/IJwsGeneralJson';
import { IJweEncryptionOptions, IJwsSigningOptions } from '../../protocols/jose/IJoseOptions';
import { KeyType } from '../../keys/KeyTypeFactory';
import { KeyUse } from '../../keys/KeyUseFactory';
/**
 * Crypto helpers support for plugable crypto layer
 */
export default class JoseHelpers {
    /**
     * Return true if the header has elements
     * @param header to test
     */
    static headerHasElements(header: JweHeader | JwsHeader | undefined): boolean;
    /**
     * Encode the header to JSON and base 64 url.
     * The Typescript Map construct does not allow for JSON.stringify returning {}.
     * TSMap.toJSON prepares a map so it can be serialized as a dictionary.
     * @param header to encode
     * @param toBase64Url is true when result needs to be base 64 url
     */
    static encodeHeader(header: JweHeader | JwsHeader, toBase64Url?: boolean): string;
    /**
     * Get the Protected to be used from the options
     * @param propertyName Property name in options
     * @param [initialOptions] The initial set of options
     * @param [overrideOptions] Options passed in after the constructure
     * @param [mandatory] True if property is required
     */
    static getOptionsProperty<T>(propertyName: string, initialOptions?: IJweEncryptionOptions | IJwsSigningOptions, overrideOptions?: IJweEncryptionOptions | IJwsSigningOptions, mandatory?: boolean): T;
    /**
     * Create the key use according to the selected algorithm.
     * @param algorithm JWA algorithm constant
     */
    static createTypeViaJwa(algorithm: string): KeyType;
    /**
     * Create the key use according to the selected algorithm.
     * @param algorithm JWA algorithm constant
     */
    static createUseViaJwa(algorithm: string): KeyUse;
}